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3 years ago

Describe how math in middle school differs from high school math class?

Mathematics

2 answers:

DaniilM [7]3 years ago

8 0

High school math classes are more advanced than middle school math classes

spin [16.1K]3 years ago

4 0

High school math classes are a higher difficulty level, but most of what you learned in middle school math classes is used. It’s best to remember what you learned because you will end up using it in high school.

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Solve the following: Three times the 1st number plus the 2nd number plus twice the 3rd is 5. If three times the 2nd number is su

Karolina [17]

Three times the 1st number plus the 2nd number plus twice the 3rd is 5 is the same as 3x+y+2z=5. If three times the 2nd number is subtracted from the sum of the 1st and three times the 3rd number, the result is 2 is just x+3z-3y=2. And if the 3rd number is subtracted from two times the 1st number and three times the 2nd, giving a result of 1 means 2x+3y-z=1. Then you use substition on these equations to get a equation where one variable equals 2 others, like using the first to get y=5-2z-3x and then this can be substituted into the other two to get x+3z-3(5-2z-3x)=2 and 2x+3(5-2z-3x)-z=1 we can then simplify and subtract the equations. After simplification we have 10x+9z=17 and 7z+7x=16 which can be turned into 70x+63z=119 and 70x+70z=160 which can be then subtracted to get that 7z=41 and z=41/7. Now we backtrack to a two variable equation like 7z+7x=16 and plug in to find x. So after plugging in we get 41+7x=16 and 7x=-25 so x=-25/7. Now we choose a 3 variable equation and plug in. So taking y=5-2z-3x we plug in 41/7 for z and -25/7 for x to get y=5-82/7+75/7 and y=5-7/7 and y=4. Therefore x = -25/7 y = 4 and z = 41/7.

3 0

3 years ago

28 + (3x - 2) + 28 = 6x

tamaranim1 [39]

28 + (3x -2) + 28 = 6x
28+ (3x -3x -2) + 28 = 6x - 3x
28+ (-2) + 28 = 3x
28 - 2 + 28 = 3x
26 + 28 = 3x
54 = 3x
18 = x

6 0

3 years ago

Read 2 more answers

Can someone help me please

jenyasd209 [6]

Answer:

Multiply $\frac { 3 } { 4 }$ by 8.

Step-by-step explanation:

We are given the following expression and we are to find its quotient:

$\frac { 3 } { 4 }$ ÷ $\frac { 1 } { 8 }$

This can also be written as:

$\frac{\frac{3}{4}}{\frac{1}{8} }$

Since the two fractions are being divided so to change this division sign into a multiplication sign, we will take the reciprocal of the fraction in the denominator and multiply 3/4 by 8.

$\frac{3}{4} \times 8$ = 6

3 0

3 years ago

Read 2 more answers

Is the square root of 42 rational or irrational? Explain

MA_775_DIABLO [31]

☽------------❀-------------☾

Hi there!

~

$\sqrt{42}$ ≈ $6.4807406984087...$

So $\sqrt{42}$ is irrational (since the decimal portion doesn't terminate or repeat)

❀Hope this helped you!❀

☽------------❀-------------☾

(The other person copied there answer from google!)

5 0

3 years ago

Carl lives in an apartment and pays the following expenses each month: electric bill, $34.60; TV streaming service, $24.99; and

Vesna [10]

$34.60 rounds to $35
$24.99 rounds to $25
$527.85 rounds to $528

Now add the rounded numbers together:
$35
$25
$528
————-
$588.00 (estimated monthly expenses)

8 0

3 years ago